From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [PATCH] drm/i915: More cautious with pch fifo
 underruns
Date: Mon, 1 Dec 2014 18:27:55 +0100
Message-ID: <20141201172755.GK32117@phenom.ffwll.local>
References: <1416844965-10284-1-git-send-email-daniel.vetter@ffwll.ch>
 <CA+gsUGRfGe3t4NcjdeA=qXysrhLY3r4CEu7z4bjTwxi1uOfy+g@mail.gmail.com>
 <20141126181731.GR32117@phenom.ffwll.local>
 <CA+gsUGR+rREuJe3VP+fyd0v3tYS4S9hEsojZHqyeG-roPQ0Vjw@mail.gmail.com>
 <20141201163643.GB32117@phenom.ffwll.local>
 <CA+gsUGTNJ_CsBw+Be_3t9UfAkiS3MOE_bSP76CBtL76MpJJZDg@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
Received: from mail-wg0-f49.google.com (mail-wg0-f49.google.com [74.125.82.49])
 by gabe.freedesktop.org (Postfix) with ESMTP id 6980B6E78E
 for <intel-gfx@lists.freedesktop.org>; Mon,  1 Dec 2014 09:27:27 -0800 (PST)
Received: by mail-wg0-f49.google.com with SMTP id n12so6518948wgh.22
 for <intel-gfx@lists.freedesktop.org>; Mon, 01 Dec 2014 09:27:26 -0800 (PST)
Content-Disposition: inline
In-Reply-To: <CA+gsUGTNJ_CsBw+Be_3t9UfAkiS3MOE_bSP76CBtL76MpJJZDg@mail.gmail.com>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://lists.freedesktop.org/archives/intel-gfx>
List-Post: <mailto:intel-gfx@lists.freedesktop.org>
List-Help: <mailto:intel-gfx-request@lists.freedesktop.org?subject=help>
List-Subscribe: <http://lists.freedesktop.org/mailman/listinfo/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=subscribe>
Errors-To: intel-gfx-bounces@lists.freedesktop.org
Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>
To: Paulo Zanoni <przanoni@gmail.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>, Intel Graphics Development <intel-gfx@lists.freedesktop.org>, Daniel Vetter <daniel.vetter@intel.com>
List-Id: intel-gfx@lists.freedesktop.org
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